Sewing-machine shuttle



(ModeL) J; TRIPP.

SEWING MACHINE SHUTTLE. No, 276,731. V Patented May 1,1883.

WITNESSES: INVBNTOR I I BY ATTORNEYS N. PETERB, PhnlwLilhognphen Wnshmglan. D c.

LII.

UNITED STATES PATENT OFFICE.

JAMES TR1PP, OF NEW YORK, N. Y., ASSIGNOR TO CHARLES T. BEOKWITH AND ELLEN F. BEOKWVITH, BOTH OF OBERLIN,

OHIO.

SEWING-MACHINE SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 276,731, dated May 1, 1883. Application filed August 3. 1882. (Model.i

To all whom it may concern:

Be it known that I, JAMES TRIPP, a citizen 1 of the United States, residingat New York city,- in the county and State of New- York, have invented certain new and useful Improvements in Shuttles for Sewing-ll [achines, of which the following is a specification.

Myinveution relates to improvements in the tension-springs t" sewing-machine shuttles; and in apivoted heel-plate employed in conjunction therewith for holding the bobbin in position.

The nature of my invention will be thor-' onghly explained by means of the accompanying specification andthe drawings annexed plan; Fig. 2, a front view; Fig. 3, area-r view; 1 Fig.4, a side view, and Fig. 5, asectional view i of Fig. 4, showing the parts of my improved;

shuttle in position for use.

view of my improved shuttle with the bobbin Fig. 6 isa plan? removed and the retaining parts in an open condition. Fig. 7 is a plan view of the same,

with the bobbin inserted and the heel-piece in place over the end thereof, ready to be latched by the combined tension-spring and heel-plate holder. Fig. 8 is an end view, showing the parts in the same position as represented in Fig. 6. Fig. 9 is aplan view, showing the bobbin separately. Fig. 10 is a side view, Fig. 11 a section Fig. 12 a plan, and Fig. 13 an end view, of the heel-plate separate. Fig. let is a plan view, Fig. 15 an under side view, Fig. 16 a front view, and Fig. 17 asectio'n, of the combined spring heel-plate holder and threader separately.

In each of the views similar letters of refererence are employed to indicate corresponding parts wherever they occur.

A represents the main body or shell of the shuttle, which on its side a, facing the shuttler-.1ce,is curved, and at a. is provided with a nose in which is formed a recess, n for the reception of a. holding-pointaflixed to the cradle or holder in' which the shuttle rests. The shuttle A is formed with the usual internal recess, a, for the reception of the bobbin B. In the forward portion of this recess a is formed a hearing, a, for the reception of one end, b, of the spindle of the bobbin B, the opposite end, I)",

of which is held by a heel-plate, O, which is formed on the end of an arm, 0, pivoted to thc upper side of the sh uttl'e-shell A. In the center of the heel-plate O is a hole which forms a bearing for the opposite end, b, of the bobbin. The recess a in the shell A is cylindrical, and the heel-plate O is so formed as to fit snugly into its mouth a exceptwhere the heel-plate is cut away, so as to form an elongated notch, G, for the reception of the lockin g portion of the tension-spring E, as hereinafter explained. A'small notch, A is formed in the upper part of the shell A, at the mouth a of ing the bent portion of the arm 0 of the heelplate 0, and thereby assist in holding the heelplate 0 in proper position.

D is a slot formed in the upper side ofthe shuttle for the passage of the thread to the eye or hole d when threading the shuttle.

Supposing the parts to be in the position shown by Figs. 6, 7, and 8, and itisdesired to insert the bobbin B, the bobbin B is pushed into the recess a so that one end, I), of its spindle shall enter the bearing a. The heelplate (3 is then turned round from the position shown by Figs. 6 and 7 into such position that it can be thrust backward over the opposite end I) of the spindle of the bobbin, sothat it shall assume the position indicated in Figs. 1 and 5, the lateral motion ot' the heel-plate being provided for by means ofa small slot, 0, which is formed in the end of the arm 0, and through which passes a retaining-pin, c affixed on the upper side of the shuttle-body A.

E is the tension-spring, which is pivoted in a recess, al in the top of the shell A, and is there retained by a binding-screw, c. This tension-spring E is provided with asuitable threading'slot, c, and at c is bent vertically and then returned at a, so as to form a locking-piece for the heel-piece C, while at the same time the heel-piece 0 forms a retaining means for the tension-spring E. After the heel-piece O has been turned and pushed back into position, (shown by Fig. 8,) so as to hold the end b of the spindle of the bobbin B, the tension-spring E is turned on its binding screw 6 from the position shown by Figs. 6, 7, and 8, so that its vertically-bent portion c shall come at the rear of the heel-piece C, so

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as to lock the heel-piece in position, while at the same time its returned portion 0 enters the notch C under the heel'piece and secures itself firmly in position. The returned portion also serves, by coming against the end of the axis of the bobbin B, to steady the same in position.

A is a-notch formed in the lower front side of the shelf A, for the purpose of allowing of the free passage of the returned portion of the spring E when it is being turned for the purpose of looking or unlocking the heelpiece 0.

After the thread has been passed through the hole at it is threaded into the eye E by means of the threading-slot c, and is drawn 011 in the ordinary manner for use, the amount of tension imparted to the thread being regulated by means of the screw 0.

By my peculiar construction of the pivoted tension-spring and the pivoted heel-piece great facility is obtained for the insertion and removal of the bobbin from the shuttle by rea son of the parts being capable of removal sidewise by the simple pressure of the fingers with out necessitating the raising of a spring to release a catch or other means from a notch or hole, as is the usual manner, and which either necessitates the employment of a tool or instrument or the risk of breaking the nails of the lady or other person employing the device, which is a fact of daily occurrence and experience with persons using sewing machines with shuttles of the ordinary and general construction.

Another advantage of my improvement is that the holding parts of the tension-sprin g go entirely over and under the heel-piece, thereby givin g greater-firmness and rigidity thereto.

Although I have shown my improvements applied to a shuttle adapted for use in a machine having a circular race, the same may readily be applied to shuttles for use in machines constructed with straight races.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

ing so formed as to pass between the under side of the heel-piece and the shell and latch and hold the pivoted heel-pieceandbar and the pivoted tension-sprin g in position, substantially as and for the purpose described.

2. In a sewing-machine shuttle, a removable heel-piece constructed with a central opening adapted to act as a bearingfor one end of the bobbin, and having a slotted arm pivoted and sliding on a pin andsecured thereby to the side of the shuttle, near to its heel, so as to admit of the bearing of the tension-spring E on the shell or body of the shuttle, between said pin and the binding-screw 6, so as to secure the necessary tension of the thread, substantially as and for the purpose specified.

3. In a sewing-machine shuttle, a removable heel-piece formed on the end of a slotted bar pivoted to the upper side of the shuttle-shell, and having a notch on its under side constructed so as to admit of the passage of the returned portion of the tension-spring beneath the same, and the locking of heel-piece and the tensionspring in position, substantially as shown and described. l

4. A sewing-machine-shuttle shell having on the side of its heel a notch adapted to admit of the passage of the locking end of a pivoted tension-s prin g, which passes entirely over and under a heel-piece, holding the same in position, substantially as and for the purpose specified.

5. In a sewing-machine shuttle, the combination, with a shell, A, and bobbin B, of the heel-piece 0, connected to the shell A by a slotted arm, 0, pivoted and sliding on a pin, '0, and secured in position bya tension-spring,- E, substantially as set forth.

6. In a sewing-machine shuttle, the combination, with a shell, A, formed with a notch, A and a bobbin,B,of the heel-pieceO, formed with a notch, 0., and connected to the shell A by a slotted and pivoted arm, 0, andpivoted tension-spring, E, having a self-retaining and heel-plate-holding portion, 6 a, substantially as and for the purpose described.

In witness whereof I have hereunto set my hand this 25th day of July, 1882.

JAMES TRIPP. 

